use https for knot ops

appview/state/git_http.go

···
 	repo := chi.URLParam(r, "repo")
 
 	// TODO: make this https for production!
-	targetURL := fmt.Sprintf("http://%s/%s/%s/info/refs?%s", knot, user.DID, repo, r.URL.RawQuery)
+	targetURL := fmt.Sprintf("https://%s/%s/%s/info/refs?%s", knot, user.DID, repo, r.URL.RawQuery)
 	resp, err := http.Get(targetURL)
 	if err != nil {
 		http.Error(w, err.Error(), http.StatusInternalServerError)
···
 	knot := r.Context().Value("knot").(string)
 	repo := chi.URLParam(r, "repo")
 	// TODO: make this https for production!
-	targetURL := fmt.Sprintf("http://%s/%s/%s/git-upload-pack?%s", knot, user.DID, repo, r.URL.RawQuery)
+	targetURL := fmt.Sprintf("https://%s/%s/%s/git-upload-pack?%s", knot, user.DID, repo, r.URL.RawQuery)
 	client := &http.Client{}
 
 	// Create new request

appview/state/signer.go

···
 		},
 	}
 
-	url, err := url.Parse(fmt.Sprintf("http://%s", domain))
+	url, err := url.Parse(fmt.Sprintf("https://%s", domain))
 	if err != nil {
 		return nil, err
 	}